Wave Analysis in Ultrasonic Inspection using Ultrasonic Visualization Method

使用超声波可视化方法进行超声波检测中的波分析

• 批准号: 08455327
• 负责人: MIHARA Tsuyoshi
• 金额: $ 4.86万
• 依托单位: TOHOKU University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455327/
• 关键词: Visualization Method; Ultrasonic Inspection; Wave Analysis; Crack; Ultrasonic Field; Photoelastic Method; Reflection; 可視化法; 波形解析; 超音波探傷; CT試験片; 画像解析; 超音波反射

Ultrasonic wave in materials is affected by microstructures, flaw, grain, inclusions and so on, and the wave form of received wave is changed during propagation. Then, wave form analysis of received echo has been considered as the important procedures for non-destructive materials evaluation. However since conversional wave analysis has used only incident wave and received wave, perfect monitoring of wave form in propagation could not be made and the effect of measurement setup dependence remain unsolved. In this report, photoelastic ultrasonic visualization system is applied to estimate the wave form analysis in the glass model specimen whose acoustic properties is similar to steel structures. This method can estimate the wave form at every ultrasonic propagation state in glass model.Estimated wave form by photoelastic ultrasonic visualization method is compared to the one by conversional method. As the results, wave form could be estimated from photoelastic ultrasonic visualization image at every state in propagation when the amplitude of the flaw echo is weak. However when the amplitude of the flaw echo is high, estimated wave form deformed because of the narrow dynamic range of the image processing system used.

超声波在材料中传播时会受到材料的微观组织、缺陷、晶粒、夹杂物等的影响，使接收到的超声波波形发生变化。然后，对接收到的回波进行波形分析被认为是无损材料评估的重要步骤。然而，由于转换波分析仅使用入射波和接收波，因此无法对传播中的波形进行完美的监测，并且测量设置依赖性的影响仍未解决。本文应用光弹性超声显像系统，对声学特性与钢结构相似的玻璃模型试件进行了波形分析。该方法可以估计超声在玻璃模型中各个传播状态下的波形，并将光弹性超声可视化方法估计的波形与传统方法估计的波形进行了比较。结果表明，当缺陷回波幅度较弱时，可以从光弹性超声可视化图像中估计出缺陷在传播过程中各个状态下的波形。然而，当缺陷回波的幅度高时，由于所使用的图像处理系统的窄动态范围，估计的波形变形。

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